DOI: 10.5194/hess-19-137-2015
Scopus记录号: 2-s2.0-84920727445
论文题名: Thermal damping and retardation in karst conduits
作者: Luhmann A ; J ; , Covington M ; D ; , Myre J ; M ; , Perne M ; , Jones S ; W ; , Alexander Jr ; E ; C ; , Saar M ; O
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 1 起始页码: 137
结束页码: 157
语种: 英语
Scopus关键词: Aquifers
; Damping
; Hydrogeology
; Landforms
; Numerical models
; Temperature
; High temporal resolution
; Multi-tracer experiments
; Non-conservative tracers
; Rock physical properties
; Variable diameter
; Variable velocities
; Water temperature data
; Water temperatures
; Recharging (underground waters)
; experimental study
; geometry
; heat balance
; karst
; numerical model
; recharge
; temperature effect
; water temperature
英文摘要: Water temperature is a non-conservative tracer in the environment. Variations in recharge temperature are damped and retarded as water moves through an aquifer due to heat exchange between water and rock. However, within karst aquifers, seasonal and short-term fluctuations in recharge temperature are often transmitted over long distances before they are fully damped. Using analytical solutions and numerical simulations, we develop relationships that describe the effect of flow path properties, flow-through time, recharge characteristics, and water and rock physical properties on the damping and retardation of thermal peaks/troughs in karst conduits. Using these relationships, one can estimate the thermal retardation and damping that would occur under given conditions with a given conduit geometry. Ultimately, these relationships can be used with thermal damping and retardation field data to estimate parameters such as conduit diameter. We also examine sets of numerical simulations where we relax some of the assumptions used to develop these relationships, testing the effects of variable diameter, variable velocity, open channels, and recharge shape on thermal damping and retardation to provide some constraints on uncertainty. Finally, we discuss a multitracer experiment that provides some field confirmation of our relationships. High temporal resolution water temperature data are required to obtain sufficient constraints on the magnitude and timing of thermal peaks and troughs in order to take full advantage of water temperature as a tracer. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78646
Appears in Collections: 气候变化事实与影响
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作者单位: University of Minnesota, Department of Earth Sciences, 310 Pillsbury Dr. SE, Minneapolis, MN, United States; University of Arkansas, Department of Geosciences, 216 Ozark Hall, Fayetteville, AR, United States; Jof Stefan Institute, Department of Systems and Control, Jamova Cesta 39, Ljubljana, Slovenia; 527 Karrow St., Maryville, TN, United States; ETH-Zürich, Geothermal Energy and Geofluids Group, Department of Earth Sciences, Zürich, Switzerland
Recommended Citation:
Luhmann A,J,, Covington M,et al. Thermal damping and retardation in karst conduits[J]. Hydrology and Earth System Sciences,2015-01-01,19(1)